Fair Value Measurements (Tables)

9 Months Ended

Dec. 30, 2012

Schedule of Assets Measured at Fair Value on a Recurring Basis

Assets measured at fair value on a recurring basis as of December 30, 2012 and April 1, 2012 are as follows:

	Fair Value Measurements Using
	Level 1		Level 2		Level 3		Total
	(In thousands)
December 30, 2012
Cash and cash equivalents	$	99,087	$	769	$	—	$	99,856
Marketable securities:
U.S. government and agency securities		133,557		—		—		133,557
Corporate debt obligations		—		178,173		—		178,173
Mortgage-backed securities		—		51,283		—		51,283
Municipal bonds		—		31,712		—		31,712
Other debt securities		—		602		—		602
		133,557		261,770		—		395,327
	$	232,644	$	262,539	$	—	$	495,183
April 1, 2012
Cash and cash equivalents	$	162,266	$	2,250	$	—	$	164,516
Marketable securities:
U.S. government and agency securities		141,859		—		—		141,859
Corporate debt obligations		—		167,668		—		167,668
Asset and mortgage-backed securities		—		46,594		—		46,594
Municipal bonds		—		16,568		—		16,568
Other debt securities		—		750		—		750
		141,859		231,580		—		373,439
	$	304,125	$	233,830	$	—	$	537,955